import { readFileSync } from "fs";
import { ApolloServer } from "@apollo/server";
import { startStandaloneServer } from "@apollo/server/standalone";
import { MergedResolvers } from "./MergedResolvers";
import { ServerContext } from "./ServerContext";
import { loadShuttleTestData, supportedIntegrationTestSystems } from "./loaders/shuttle/loadShuttleTestData";
import { InterchangeSystem, InterchangeSystemBuilderArguments } from "./entities/InterchangeSystem";

const typeDefs = readFileSync("./schema.graphqls", "utf8");

// In the future this can be stored as a separate file
const supportedSystems: InterchangeSystemBuilderArguments[] = [
  {
    id: "1",
    passioSystemId: "263",
    name: "Chapman University",
  }
]

async function main() {
  const server = new ApolloServer<ServerContext>({
    typeDefs,
    resolvers: MergedResolvers,
    introspection: process.env.NODE_ENV !== "production",
  });

  let systems: InterchangeSystem[];

  if (process.argv.length > 2 && process.argv[2] == "integration-testing") {
    console.log("Using integration testing setup")

    systems = await Promise.all(supportedIntegrationTestSystems.map(
      async (systemArguments) => {
        const system = InterchangeSystem.buildForTesting(systemArguments);

        // TODO: Have loading of different data for different systems in the future
        await loadShuttleTestData(system.shuttleRepository);

        return system;
      }
    ));
  } else {
    systems = await Promise.all(supportedSystems.map(
      async (systemArguments) => {
        return await InterchangeSystem.build(systemArguments);
      },
    ));
  }

  const { url } = await startStandaloneServer(server, {
    listen: {
      port: process.env.PORT ? parseInt(process.env.PORT) : 4000,
    },
    context: async () => {
      return {
        systems,
        findSystemById: (id: string) => {
          const system = systems.find((system) => system.id === id);
          if (!system) {
            return null;
          }
          return system;
        },
      }
    },
  });


  console.log(`Server ready at: ${url}`);
}

main();